Electrochemical Application Of Modified Two-dimensional Carbon Composites

Nowadays,with the rapid development of science,energy shortage and environmental problems have been the focus of scientists.Two-dimensional carbon materials?graphene?have been widely studied by researchers due to their stable chemical properties,high mechanical strength and electrical conductivity.Because of its advantages in physical and chemical properties,we applied it to electrochemical sensors and the cathode catalysts of the fuel cell.However,because of the poor dispersivity and poor performance of the simple two-dimensional carbon materials,has been limited the electrochemical used.In this paper,a series of modified two-dimensional carbon composites were prepared.And the use of high resolution transmission electron microscopy?HRTEM?,X ray diffraction?XRD?,Fourier transform infrared spectroscopy?IR?,UV-Vis absorption spectroscopy?vis-UV?analyzed characterization of modified carbon materials synthesis,finally using electrochemical workstation to evaluate electrocatalytic properties.This paper use the method of liquid phase stripping for preparation of graphene oxide,mixed gold particles and graphene oxide,EP-AB-44 as the reducing agent,through one step synthesis of gold nanoparticles/graphene composite materials,the preparation of gold nanoparticles can be uniformly distributed on the surface of graphene,and the particle size of about 3nm.To explore the size of AuNPs is related to the electrochemistry property,we also prepare AuNPs by ascorbic acid.The results illustrate the small gold the nanoparticles have a high surface area and active site,can improve the ability to detect hydrogen peroxide.The measured detection limit of 0.45?M?three times the selection signal to noise ratio?,the sensitivity is 0.283?A?M^-1cm^-2.Based on the electrocatalytic detection of hydrogen peroxide,this paper also discuss the nitrogen-doped porous carbon nanosheets templated from g-C₃N₄.In this paper,a serise of different temperature of hydrothermal cladding samples was prepared,and the kinetic principle of the material was measured by rotating disk electrode.The material is based on carbon materials as metal-free electrocatalysts for efficient oxygen reduction reaction,which is different from platinum catalysts,the catalyst has no requirement for fuel purity,and difficult to cause catalyst poisoning.Moreover,the material is economical and practical,and has commercial potential.